1212255121044 has 72 divisors (see below), whose sum is σ = 3110596424320. Its totient is φ = 367175255040.

The previous prime is 1212255121027. The next prime is 1212255121057. The reversal of 1212255121044 is 4401215522121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2870517 + ... + 3265635.

Almost surely, 2^{1212255121044} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212255121044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1555298212160).

1212255121044 is an abundant number, since it is smaller than the sum of its proper divisors (1898341303276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212255121044 is a wasteful number, since it uses less digits than its factorization.

1212255121044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397261 (or 397248 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The spelling of 1212255121044 in words is "one trillion, two hundred twelve billion, two hundred fifty-five million, one hundred twenty-one thousand, forty-four".